Steve Hilton believes the former Prime Minister is well placed to walk back into Number 10 if Mrs May is removed by a vote of no confidence. Mr Cameron’s return could now be “the best hope for Britain”, his former Downing Street guru said. Writing in the Sunday Times, Mr Hilton described the UK’s current political turmoil as a “national emergency”.

He said: “What Britain needs above all is a leader with the confidence and the character to command respect and bring people together from all sides of this bruising two-year meltdown.

“If there is a Conservative Party leadership election, no doubt many able MPs will throw their hat in the ring.

“But there’s one name that should also be on the list: David Cameron”.

Mr Hilton savaged British politicians for suffering a “nervous breakdown” since the UK voted by 52 percent to 48 percent in June 2016 to leave the EU.

He accused Boris Johnson and Michael Gove of an “abdication of responsibility” over their pro-Leave campaign.

The Civil Service was also attacked as being “comically incapable”, with Mr Hilton adamant that two years of negotiations by Mrs May’s government were “doomed to failure”.

He added: “The former prime minister reportedly remarked in the early hours of June 24, after the Brexit vote had gone against him, “Why should I do all the hard s***?”

“I think we know the answer to that now. And, considering where we are now David Cameron’s return to No 10 could in fact be the best hope for Britain.”

Mr Cameron quit as Prime Minister on the morning after the June 23, 2016 referendum.

His ex-adviser’s renewed support comes as more MPs handed in letters of no confidence on Mrs May’s leadership.

Jacob Rees-Mogg is the most prominent politician to have tabled his letter to 1922 Committee chair Sir Graham Brady.

At least 22 MPs are believed to have submitted no-confidence letters.

And following last week’s Westminster turmoil, Mr Hilton claimed the current Prime Minister was “clearly” not fit to lead the UK though the Brexit negotiations.

He said: “It’s clear that Theresa May’s plan for leaving the EU is not going to work, for the basic reason that it does not ensure that Britain leaves the EU.

“It’s also true that the prime minister’s “deal” is about the best that anyone could have negotiated.